\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Calculate the sum of the vectors \(\vec{u} = \begin{pmatrix} 1 \\ 2 \\ 3\\ \end{pmatrix}\) and \(\vec{v} = \begin{pmatrix} 4 \\ 5\\ 6\\ \end{pmatrix}\).
\(\vec{u} + \vec{v} =\begin{pmatrix} \input{126583}{}{3em}{2em}{}{}\\ \input{226583}{}{3em}{2em}{}{}\\ \input{326583}{}{3em}{2em}{}{} \\ \end{pmatrix} \)